Date   

Re: Speaking of MOQs

Dave G8KHU
 

Hi Conrad, Andy

Mini-Circuits have had a shake-up in their sales policy a few years ago and the minimum number you could purchase of any individual part number increased. So now if you want 1x XYZ-1 and 1x XYZ-2 you have to buy 20 of each (for the gain block case). They've even extended this to high value parts, I use several of their VCOs in a particular product and the VCOs used to be available singly if you so wanted, at a premium obviously. Now VCOs are only sold as a reeled option and you have to buy either 10, 20, 50 or 200 at a time. This is no fun when the VCOs are £40 each in quantity :-(. Currently their minimum order charge is £50 per order.

Conrad, both the parts you mentioned are on their sample scheme, IIRC you can get three samples of each of three products in any thirty day period. You have to fill out a form on line but I’ve never had a problem and they usually get despatched from them to you same day. Obviously things aren't normal at the moment.

It's not quite as good a part but I have a couple of reels of GVA-63+ in stock that you can have a few of if that would help ?

73s Dave


Re: Dishes again - POTY antenna

John E. Beech
 

Hi Graham,
Yes it is very similar. The pattern of ribs on mine is different . From what I can remember the feed arrangement was pretty much the same. I helped install it in the first place, but that was over 20 years ago! Here is what mine actually looks like: https://photos.app.goo.gl/bKwQPhDAVhHXUaxu9
The mount is very heavy - about a half hundred weight or more. It took two of us to lift it onto the car roof rack (behind) but I managed to lift it off on my own. Fortunately, I'm a 17 stone ex-prop forward and although I'm 71 I've retained most of my strength.
The dish is quite light, so I am hoping to use a wall bracket that I've already got off a slightly smaller steel dish. It was originally mounted on a pole set in concrete, but this snapped off at ground level due to corrosion. It was releatively thin wall pipe - less than 1/8". The rest of the mount is made of 1/4 " box section and plate, which is why it is so heavy. And there is the jack and its motor. ( I've got the control box.) Free to a good home.

de John G8SEQ

-------Original Message-------
From: Graham Shirville <graham@shirville.com>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
Sent: May 14 '20 23:17

Sorry - works better with an actual link....it is getting late!

https://forum.batc.org.uk/viewtopic.php?f=101&t=6026

On 14/05/2020 23:10, Graham Shirville wrote:
> Hi John,
>
> Maybe this discussion on the BATC forum last year could help...if it
> is the same sort of dish then somewhere I have also seen a foto with
> the precise lengths of all 3 arms and the LNB bracketry marked up...
>
> 73
>
> Graham G3VZV
>
> On 14/05/2020 21:53, John E. Beech wrote:
>> Hi Paul,
>>              Ah, well I have a bit of a head start. I have 2/3 of the
>> LNB support structure - a long rod and a short rod with information
>> from the previous owner that the short rod went to the bottom of the
>> dish ie the outer edge of the long diameter, so the POTY patch will
>> go somewhere near where  they meet. If I can't get the laser cut bits
>> to hackle I'll knock up a splash plate & crossed dipoles - they've
>> worked on 23 cms in the past with similar focal length dish.
>>
>> de John G8SEQ
>>
>>>   -------Original Message-------
>>>   From: Paul Entwistle via groups.io <g8afc=ntlworld.com@groups.io>
>>>   To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>>>   Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
>>>   Sent: May 14 '20 21:08
>>>     John -  It sounds like you have the same dish I have, mine came
>>> without the LNB support structure but I found a DOS based
>>> application written by Paul Wade W1GHZ that worked very well.
>>>   I "think" the link to it came via one of his publications but a
>>> little drilling around "Offset Dish Calculator" should get you there.
>>>     Good Luck
>>>     Paul G8AFC
>>>     -----Original Message-----
>>>   From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On
>>> Behalf Of John E. Beech
>>>   Sent: 14 May 2020 19:13
>>>   To: UKMicrowaves@groups.io
>>>   Subject: [UKMicrowaves] Dishes again - POTY antenna
>>>     My latest acquisition is an elliptical ie offset feed dish 1.2 X
>>> 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms.
>>> Question will the POTY patch antenna work with this dish on its own
>>> ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm  Cu tube
>>> up the middle?).
>>>           And (sanity check) the gain of this elliptical dish will
>>> be the same as a prime focus dish of the same (short) diameter.
>>>              Going back to an ealier thread, this dish is all fibre
>>> glass, no metal to be seen anywhere inside or out. ( I know this
>>> because the rim got damaged when it was blown over in a gale.) It
>>> does have a rippled finish a bit like a golf ball which is supposed
>>> to increase the surface area and therefore the gain. That sounds
>>> like bollocks to me - more likely a device for reducing the
>>> reflectivity in the infra red to stop the LNB getting cooked in
>>> bright sunlight.
>>>     de John G8SEQ
>>
>>
>
>
>




Re: Tips for successfully locking Kuhne transverters

Conrad, PA5Y
 

No sooner did I post  I realised that I answered my own question and so I tuned the crystal so it was close to the correct frequency. Then sure enough all was well. I suppose that this thing has been sat in a cupboard at Kuhne for quite some time, the 28MHz IF versions are much less popular. I have RX and TX image response at -90dBc or better (no more dynamic range) and LO leakage is no longer visible. Yes I have a nice filter with notches.

 

Anyway it seems to be very stable now.

 

I had no such problems with the MKU 23 but that was pre-owned and no doubt the previous owner went through this.

 

73

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of Conrad, PA5Y via groups.io
Sent: 15 May 2020 00:10
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Tips for successfully locking Kuhne transverters

 

Hello chaps.

 

Tonight I connected up my Kuhne MKU13 G3 28 for the first time, at the same time I connected my trusty locked TS2000. I tuned to GB3MHZ and as usual it appeared bang on 1296.830 on the locked TS2000. I have a K3S and have no XV Offset. The K3S is locked and with my Iceni on 432 everything is spot on, that injection locks perfectly. The MKU13 locking is quite frankly awful. I have tried 3-10dBm in 1dB steps as an input amplitude. I use the same 10MHz source for everything. I can hear some decidedly strange glitches going on as well. So what is likely to be amiss? I have not connected a lock LED yet. I don’t need one, the frequency offset and glitches tell me that things are not quite right. Do I need to tune the Xtal to get it closer, I suppose that the pull range is somewhat limited?

 

73

 

Conrad


Re: Dishes again - POTY antenna

John E. Beech
 

I did wonder!

-------Original Message-------
From: Graham Shirville <graham@shirville.com>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
Sent: May 14 '20 23:17

Sorry - works better with an actual link....it is getting late!

https://forum.batc.org.uk/viewtopic.php?f=101&t=6026

On 14/05/2020 23:10, Graham Shirville wrote:
> Hi John,
>
> Maybe this discussion on the BATC forum last year could help...if it
> is the same sort of dish then somewhere I have also seen a foto with
> the precise lengths of all 3 arms and the LNB bracketry marked up...
>
> 73
>
> Graham G3VZV
>
> On 14/05/2020 21:53, John E. Beech wrote:
>> Hi Paul,
>>              Ah, well I have a bit of a head start. I have 2/3 of the
>> LNB support structure - a long rod and a short rod with information
>> from the previous owner that the short rod went to the bottom of the
>> dish ie the outer edge of the long diameter, so the POTY patch will
>> go somewhere near where  they meet. If I can't get the laser cut bits
>> to hackle I'll knock up a splash plate & crossed dipoles - they've
>> worked on 23 cms in the past with similar focal length dish.
>>
>> de John G8SEQ
>>
>>>   -------Original Message-------
>>>   From: Paul Entwistle via groups.io <g8afc=ntlworld.com@groups.io>
>>>   To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>>>   Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
>>>   Sent: May 14 '20 21:08
>>>     John -  It sounds like you have the same dish I have, mine came
>>> without the LNB support structure but I found a DOS based
>>> application written by Paul Wade W1GHZ that worked very well.
>>>   I "think" the link to it came via one of his publications but a
>>> little drilling around "Offset Dish Calculator" should get you there.
>>>     Good Luck
>>>     Paul G8AFC
>>>     -----Original Message-----
>>>   From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On
>>> Behalf Of John E. Beech
>>>   Sent: 14 May 2020 19:13
>>>   To: UKMicrowaves@groups.io
>>>   Subject: [UKMicrowaves] Dishes again - POTY antenna
>>>     My latest acquisition is an elliptical ie offset feed dish 1.2 X
>>> 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms.
>>> Question will the POTY patch antenna work with this dish on its own
>>> ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm  Cu tube
>>> up the middle?).
>>>           And (sanity check) the gain of this elliptical dish will
>>> be the same as a prime focus dish of the same (short) diameter.
>>>              Going back to an ealier thread, this dish is all fibre
>>> glass, no metal to be seen anywhere inside or out. ( I know this
>>> because the rim got damaged when it was blown over in a gale.) It
>>> does have a rippled finish a bit like a golf ball which is supposed
>>> to increase the surface area and therefore the gain. That sounds
>>> like bollocks to me - more likely a device for reducing the
>>> reflectivity in the infra red to stop the LNB getting cooked in
>>> bright sunlight.
>>>     de John G8SEQ
>>
>>
>
>
>




Re: Dishes again - POTY antenna

Graham Shirville
 

Sorry - works better with an actual link....it is getting late!

https://forum.batc.org.uk/viewtopic.php?f=101&t=6026

On 14/05/2020 23:10, Graham Shirville wrote:
Hi John,

Maybe this discussion on the BATC forum last year could help...if it is the same sort of dish then somewhere I have also seen a foto with the precise lengths of all 3 arms and the LNB bracketry marked up...

73

Graham G3VZV

On 14/05/2020 21:53, John E. Beech wrote:
Hi Paul,
             Ah, well I have a bit of a head start. I have 2/3 of the LNB support structure - a long rod and a short rod with information from the previous owner that the short rod went to the bottom of the dish ie the outer edge of the long diameter, so the POTY patch will go somewhere near where  they meet. If I can't get the laser cut bits to hackle I'll knock up a splash plate & crossed dipoles - they've worked on 23 cms in the past with similar focal length dish.

de John G8SEQ

  -------Original Message-------
  From: Paul Entwistle via groups.io <g8afc=ntlworld.com@groups.io>
  To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
  Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
  Sent: May 14 '20 21:08
    John -  It sounds like you have the same dish I have, mine came without the LNB support structure but I found a DOS based application written by Paul Wade W1GHZ that worked very well.
  I "think" the link to it came via one of his publications but a little drilling around "Offset Dish Calculator" should get you there.
    Good Luck
    Paul G8AFC
    -----Original Message-----
  From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of John E. Beech
  Sent: 14 May 2020 19:13
  To: UKMicrowaves@groups.io
  Subject: [UKMicrowaves] Dishes again - POTY antenna
    My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm  Cu tube up the middle?).
          And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.
             Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.
    de John G8SEQ


Re: Dishes again - POTY antenna

Graham Shirville
 

Hi John,

Maybe this discussion on the BATC forum last year could help...if it is the same sort of dish then somewhere I have also seen a foto with the precise lengths of all 3 arms and the LNB bracketry marked up...

73

Graham G3VZV

On 14/05/2020 21:53, John E. Beech wrote:
Hi Paul,
Ah, well I have a bit of a head start. I have 2/3 of the LNB support structure - a long rod and a short rod with information from the previous owner that the short rod went to the bottom of the dish ie the outer edge of the long diameter, so the POTY patch will go somewhere near where they meet. If I can't get the laser cut bits to hackle I'll knock up a splash plate & crossed dipoles - they've worked on 23 cms in the past with similar focal length dish.

de John G8SEQ

-------Original Message-------
From: Paul Entwistle via groups.io <g8afc=ntlworld.com@groups.io>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
Sent: May 14 '20 21:08
John -  It sounds like you have the same dish I have, mine came without the LNB support structure but I found a DOS based application written by Paul Wade W1GHZ that worked very well.
I "think" the link to it came via one of his publications but a little drilling around "Offset Dish Calculator" should get you there.
Good Luck
Paul G8AFC
-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of John E. Beech
Sent: 14 May 2020 19:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Dishes again - POTY antenna
My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm  Cu tube up the middle?).
        And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.
         Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.
de John G8SEQ


Tips for successfully locking Kuhne transverters

Conrad, PA5Y
 

Hello chaps.

 

Tonight I connected up my Kuhne MKU13 G3 28 for the first time, at the same time I connected my trusty locked TS2000. I tuned to GB3MHZ and as usual it appeared bang on 1296.830 on the locked TS2000. I have a K3S and have no XV Offset. The K3S is locked and with my Iceni on 432 everything is spot on, that injection locks perfectly. The MKU13 locking is quite frankly awful. I have tried 3-10dBm in 1dB steps as an input amplitude. I use the same 10MHz source for everything. I can hear some decidedly strange glitches going on as well. So what is likely to be amiss? I have not connected a lock LED yet. I don’t need one, the frequency offset and glitches tell me that things are not quite right. Do I need to tune the Xtal to get it closer, I suppose that the pull range is somewhat limited?

 

73

 

Conrad


Re: Dishes again - POTY antenna

John E. Beech
 

Tnx Chris I read your e-mail after posting another e-mail. I now know where the feed point should be because I have two thirds of the structure and know the missing bit is one of the long arms, so can easily fabricate it from a bit of conduit or similar ( piece of wood for that matter!) Also I 've noticed that one of the ribs on the back of the dish is labelled "boresight rib". Just need to fabricate something to support the POTY patch elements.

de John G8SEQ

-------Original Message-------
From: Chris Bartram G4DGU <chris@chris-bartram.co.uk>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
Sent: May 14 '20 20:41

Hello John,

What you have is a 1.2m offset dish. Because it is effectively only
part  of a larger dish, and effectively 'slopes' by around 20degrees,
the wave front will see the reflector as as having the same area as a
symmetrical dish 1.2m in either direction. That may seem a waste of
reflector area, but because the feed is shifted outside the direct path
of the incoming wave, 'feed blockage' isn't an issue. Also, because the
effective f/D ratio of the dish is relatively large, it is easier to
feed the dish efficiently than an antenna with a small f/D.

The feed position will be exactly the same as that of the original TV
LNB. You need to duplicate that. If the original feed support structure
is present, then use the original support. If not, good luck! There are
a couple of pieces of software which will help you solve the problem,
and I think I also have a copy of a paper which, if my memory isn't too
damaged, looks more-or-less rigorously at extracting the dish parameters.

Hope that's useful.

73

Chris

G4DGU


On 14/05/2020 19:13, John E. Beech wrote:
> My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm  Cu tube up the middle?).
>          And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.
>
>           Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.
>
> de John G8SEQ
>
>
>




Re: Dishes again - POTY antenna

John E. Beech
 

Hi Paul,
Ah, well I have a bit of a head start. I have 2/3 of the LNB support structure - a long rod and a short rod with information from the previous owner that the short rod went to the bottom of the dish ie the outer edge of the long diameter, so the POTY patch will go somewhere near where they meet. If I can't get the laser cut bits to hackle I'll knock up a splash plate & crossed dipoles - they've worked on 23 cms in the past with similar focal length dish.

de John G8SEQ

-------Original Message-------
From: Paul Entwistle via groups.io <g8afc=ntlworld.com@groups.io>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Dishes again - POTY antenna
Sent: May 14 '20 21:08

John -  It sounds like you have the same dish I have, mine came without the LNB support structure but I found a DOS based application written by Paul Wade W1GHZ that worked very well.
I "think" the link to it came via one of his publications but a little drilling around "Offset Dish Calculator" should get you there.

Good Luck

Paul G8AFC

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of John E. Beech
Sent: 14 May 2020 19:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Dishes again - POTY antenna

My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm  Cu tube up the middle?).
        And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.

         Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.

de John G8SEQ







Re: Dishes again - POTY antenna

Paul Entwistle
 

John - It sounds like you have the same dish I have, mine came without the LNB support structure but I found a DOS based application written by Paul Wade W1GHZ that worked very well.
I "think" the link to it came via one of his publications but a little drilling around "Offset Dish Calculator" should get you there.

Good Luck

Paul G8AFC

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of John E. Beech
Sent: 14 May 2020 19:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Dishes again - POTY antenna

My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm Cu tube up the middle?).
And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.

Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.

de John G8SEQ


Re: Dishes again - POTY antenna

Chris Bartram G4DGU
 

Hello John,

What you have is a 1.2m offset dish. Because it is effectively only part  of a larger dish, and effectively 'slopes' by around 20degrees, the wave front will see the reflector as as having the same area as a symmetrical dish 1.2m in either direction. That may seem a waste of reflector area, but because the feed is shifted outside the direct path of the incoming wave, 'feed blockage' isn't an issue. Also, because the effective f/D ratio of the dish is relatively large, it is easier to feed the dish efficiently than an antenna with a small f/D.

The feed position will be exactly the same as that of the original TV LNB. You need to duplicate that. If the original feed support structure is present, then use the original support. If not, good luck! There are a couple of pieces of software which will help you solve the problem, and I think I also have a copy of a paper which, if my memory isn't too damaged, looks more-or-less rigorously at extracting the dish parameters.

Hope that's useful.

73

Chris

G4DGU

On 14/05/2020 19:13, John E. Beech wrote:
My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm Cu tube up the middle?).
And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.

Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.

de John G8SEQ


Dishes again - POTY antenna

John E. Beech
 

My latest acquisition is an elliptical ie offset feed dish 1.2 X 1.35 m which I plan on using on 2.45 GHz Tx for satellite comms. Question will the POTY patch antenna work with this dish on its own ie without the 10 GHz LNB. If so how do I mount it? ( 22 mm Cu tube up the middle?).
And (sanity check) the gain of this elliptical dish will be the same as a prime focus dish of the same (short) diameter.

Going back to an ealier thread, this dish is all fibre glass, no metal to be seen anywhere inside or out. ( I know this because the rim got damaged when it was blown over in a gale.) It does have a rippled finish a bit like a golf ball which is supposed to increase the surface area and therefore the gain. That sounds like bollocks to me - more likely a device for reducing the reflectivity in the infra red to stop the LNB getting cooked in bright sunlight.

de John G8SEQ


Re: Speaking of MOQs

Andy G4JNT
 

Isn't the Mini-Circuits MOQ based on value of the total, not the number of one product ?
That certainly used to be the case, I've done it before to build up the junk box. (ERA devices, I think it was)
Ring them and ask.
 


On Thu, 14 May 2020 at 18:46, Conrad, PA5Y <g0ruz@...> wrote:

I am after 4 or so PHA-1+ or PHA-1H+ devices. The MOQ from Mini circuits is 20, add the shipping and I am looking at €70,00! This is too much. I want the real deal, mouser stock them but don’t ship them to the Netherlands. Is anyone aware of an alternative that will not take 6 weeks to get here.

 

Also a PA2V is looking for some MGA53543, same situation he tells me.

 

Any ideas?

 

Regards

 

Conrad PA5Y


Speaking of MOQs

Conrad, PA5Y
 

I am after 4 or so PHA-1+ or PHA-1H+ devices. The MOQ from Mini circuits is 20, add the shipping and I am looking at €70,00! This is too much. I want the real deal, mouser stock them but don’t ship them to the Netherlands. Is anyone aware of an alternative that will not take 6 weeks to get here.

 

Also a PA2V is looking for some MGA53543, same situation he tells me.

 

Any ideas?

 

Regards

 

Conrad PA5Y


Re: What Moon/Sun tracking software is being used.

Nick Gregory G0HIK
 

For the time being a 10 turn pot will have to do on 23cm's and portable.

But going up to 10G I'm sure things are going to get a whole lot more serious.

Nick G0HIK


Re: N plug for RG401

ian hope (2E0IJH)
 

Try Asking Matt Jeffery M0MAT on Ebay or webstore, He might know a source
 
Ian
2e0ijh

 
 
Sent: Thursday, May 14, 2020 at 10:31 AM
From: "Phil Guttridge G3TCU" <p.guttridge@...>
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] N plug for RG401
Can anyone suggest where I can get a straight N plug for RG401 (0.250" semi-rigid) e.g. Amphenol 172139 without the high shipping cost or MOQ of the main distributors that stock these?

I can only find right angle types on eBay.

Thanks & 73, Phil G3TCU

 


Re: N plug for RG401

DougF VK4OE
 

Greetings to all!

Another suggestion is to identify which company is your local agent for the Taiwanese connector manufacturing group "Jyebao", a source of excellent quality products.

Here in Australia, an Adelaide-based outfit called "RF Shop" keeps a fair range of Jyebao connectors, and is able to acquire any of the entire Jyebao catalogue, including the exact 'N' connector that you seek.

I'm not sure if "RF Shop" is still operating there in the UK, but a few years ago they were....  If they still are 'around', then it's likely that they should be able to get them in for you in small quantities.  I know this because I have used their services for exactly that type of connector (plus the .25" semi-rigid as well).

Very best wishes,

--Doug Friend, VK4OE.

On 14/05/2020 7:31 pm, Phil Guttridge G3TCU wrote:
Can anyone suggest where I can get a straight N plug for RG401 (0.250" semi-rigid) e.g. Amphenol 172139 without the high shipping cost or MOQ of the main distributors that stock these?

I can only find right angle types on eBay.

Thanks & 73, Phil G3TCU


Re: What Moon/Sun tracking software is being used.

Conrad, PA5Y
 

Hello Alan, for big dish EME pointing the ERC-M and PSTRotator solution is unsuitable. The ERC-M has a 10 bit ADC so for AZ 360/1024 ideally would give you 0.35 deg. PSTRotator with the ERC-M interface allows 1 deg increments for AZ and 0.1 deg for EL. So definitely not good enough for such a large dish. However it is perfectly adequate for anything that you are going to turn with a KR400!

The VK5DJ controller is one popular solution and the other (and by far the most popular) is the OE5JFL stand alone tracker combined with MAB25 or equivalent encoders.  It order to reduce backlash to acceptable levels most new systems are using solar slewing rings. Mine are on a slow boat from China and they have 0.1 deg backlash. They are for a 5m dish which is in a slow factory in China.

I opted for the OE5JFL controller and HH12 encoders which are 12bit absolute encoders, resolution is more than adequate.

I hope to get it all finished some time this year....

73

Conrad PA5Y


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Alan Beard via groups.io <beardal@...>
Sent: 14 May 2020 03:28
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] What Moon/Sun tracking software is being used.
 
Hi guys,

I'd ask of the software: What accuracy does it support?

23cm, 5m dish, required pointing accuracy: 0.5 deg.

The John Drew VK5DJ controller  as designed for VK3UM, as I recall, 
does 0.01 deg. in his software.

One's biggest problem is the position accuracy in the rotator.
My KR-400 could be up to 20 deg. out. Readily available absolute shaft encodes
do 1024 steps per rotation. 1024 / 360 => 0.3 deg. resolution. 

BTW: I've asked the "hamlib" developers to consider this and they have improved
the available accuracy in the "hamlib" library.

80                    (A problem solver, have AC, need DC)

Alan VK2ZIW


On Wed, 13 May 2020 12:25:03 -0700, Nick Gregory G0HIK via groups.io wrote
> Thanks guys,
>
> I'll look at both of those and MoonSked and will report back how I get on, pretty sure I tried WXTrack in the past at some time.
>
> Nick G0HIK

---------------------------------------------------
Alan Beard

OpenWebMail 2.53


Re: N plug for RG401

Paul G8KFW
 

Hi Phil

 

Just a line on right angle N connectors  as I do not now the frequency you are considering but good quality right angle N connecters result in strange frequency responses and any inferior makes more so

All should be OK up to 2.5  ghz

 

Paul


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Stephen Tompsett
Sent: 14 May 2020 10:52
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] N plug for RG401

 

Mouser? there is a minimum order value to get free delivery. If you don't want a few spare connectors just take the opportunity to stock up on things you will need!

e.g. A Radiall connector I used in some preamps I built:  https://www.mouser.co.uk/ProductDetail/501-R161054000

On 14/05/2020 10:31, Phil Guttridge G3TCU wrote:

Can anyone suggest where I can get a straight N plug for RG401 (0.250" semi-rigid) e.g. Amphenol 172139 without the high shipping cost or MOQ of the main distributors that stock these?

I can only find right angle types on eBay.

Thanks & 73, Phil G3TCU

-- 
Stephen Tompsett (G8LYB)
Tel: 01788 578940
Mob: 07956 855816

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--
Paul Bicknell G8KFW   South Coast UK


Re: N plug for RG401

Stephen Tompsett
 

Mouser? there is a minimum order value to get free delivery. If you don't want a few spare connectors just take the opportunity to stock up on things you will need!

e.g. A Radiall connector I used in some preamps I built:  https://www.mouser.co.uk/ProductDetail/501-R161054000

On 14/05/2020 10:31, Phil Guttridge G3TCU wrote:
Can anyone suggest where I can get a straight N plug for RG401 (0.250" semi-rigid) e.g. Amphenol 172139 without the high shipping cost or MOQ of the main distributors that stock these?

I can only find right angle types on eBay.

Thanks & 73, Phil G3TCU


-- 
Stephen Tompsett (G8LYB)
Tel: 01788 578940
Mob: 07956 855816

8881 - 8900 of 64269